Celtuce
Celtuce (/ˈsɛlt.əs/) (Lactuca sativa var. augustana, angustata, or asparagina), also called stem lettuce, celery lettuce, asparagus lettuce, or Chinese lettuce, is a cultivar of lettuce grown primarily for its thick stem or its leaves. It is used as a vegetable. In mainland China, the family is informally called woju (traditional Chinese: 萵苣; simplified Chinese: 莴苣; pinyin: wōjù), which is also the name of a cultivar. It is especially popular in both mainland China and Taiwan, where the stem is interchangeably called wosun (traditional Chinese: 萵筍; simplified Chinese: 莴笋; pinyin: wōsǔn) or qingsun (青筍; 青笋; qīngsǔn).
| Celtuce | |
|---|---|
Celtuce stems and heads | |
| Species | Lactuca sativa var. augustana |
| Cultivar | 'Celtuce' |
| Origin | Mediterranean region |
| Nutritional value per 100 g (3.5 oz) | |
|---|---|
| Energy | 75 kJ (18 kcal) |
3.65 g | |
| Dietary fiber | 1.7 g |
0.3 g | |
0.85 g | |
| Vitamins | Quantity %DV† |
| Vitamin A equiv. | 22% 175 μg |
| Thiamine (B1) | 5% 0.055 mg |
| Riboflavin (B2) | 6% 0.07 mg |
| Niacin (B3) | 4% 0.55 mg |
| Pantothenic acid (B5) | 4% 0.183 mg |
| Vitamin B6 | 4% 0.05 mg |
| Folate (B9) | 12% 46 μg |
| Vitamin C | 23% 19.5 mg |
| Minerals | Quantity %DV† |
| Calcium | 4% 39 mg |
| Iron | 4% 0.55 mg |
| Magnesium | 8% 28 mg |
| Manganese | 33% 0.688 mg |
| Phosphorus | 6% 39 mg |
| Potassium | 11% 330 mg |
| Sodium | 1% 11 mg |
| Zinc | 3% 0.27 mg |
| |
| †Percentages are roughly approximated using US recommendations for adults. Source: USDA FoodData Central | |
The pale green leaves, which are tender, and white stems can be eaten raw (in salads) or cooked. It can be pickled, grilled, roasted, or stir-fried. It is mild but nutty, with a slight smoky aftertaste. It is high in vitamins.
Popular sources identify it as originating in the Mediterranean region and then being brought to China during the Tang dynasty, about A.D. 600–900.
It can be grown from seed and is sown from April through May in the Northern Hemisphere. The seeds can be planted in a set bed or a temporary nursery bed and then transplanted to the growing site. They should be spread 30 cm apart each way. The young (edible) leaves are ready about 4–5 weeks after planting and the edible stems are ready when about 30 cm tall. They are usually harvested between July and September.
The plant can suffer from aphid attacks.